fix local assignment

was missing a method that got lost in copy/paste
also renaming to get guard to pick up tests

lib/ruby.rb

@@ -9,7 +9,7 @@ end
 
 require_relative "ruby/statement"
 require_relative "ruby/statements"
-require_relative "ruby/assignment_statement"
+require_relative "ruby/assignment"
 require_relative "ruby/array_statement"
 require_relative "ruby/block_statement"
 require_relative "ruby/if_statement"

lib/ruby/assignment.rb

@@ -39,10 +39,6 @@ module Ruby
 
   class IvarAssignment < Assignment
 
-    def to_vool()
-      super()
-      return Vool::IvarAssignment.new(@name , @value)
-    end
   end
 
   class LocalAssignment < Assignment

lib/vool/local_assignment.rb

@@ -8,6 +8,11 @@ module Vool
       from = @value.slot_definition(compiler)
       return chain_assign( Mom::SlotLoad.new(to,from) , compiler)
     end
+
+    def chain_assign(assign , compiler)
+      return assign unless @value.is_a?(SendStatement)
+      @value.to_mom(compiler) << assign
+    end
   end
 
 end